USE JAVASCRIPT TO CAPTURE OPEN SUBTITLES

Open youtube.com
Open this video
https://youtu.be/NvqWkVapZOc
Copy link to this video

Open y2mate.com
Paste the link
Download video to your phone
Rename the file name to "flame-mountain.mp4"

Copy the html code (press the button below)
Open "Notepad" app
Create new file. Paste html code. Save as "flame-mountain.html" in the same folder, where the mp4 file is saved

Press on the file
flame-mountain.html" Choose "Chrome"
Press "JUST ONCE"

HOW TO USE THIS html FILE
1- In the input text box at the button "New" type the time point (in seconds) you want this video to start playing
2- Press the button "Begin"
3- Every time you see a new subtitle appear, you need to immediately press the "Capture" button.
4- After 8 or 10 times pressing the "Capture" button, press the "Pause" button and then press the "Merge Canvases" button
5- A new tab will open, with images of the subtitles you got when you pressed the "Capture" button.
6- Download this image to your phone.

<!DOCTYPE html> <html>
<head>
<meta charset="utf-8"> 
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
<head>

.dragger {
        position: absolute;
        left: 0px;
        top: 0px;
        width: 60px;
        height: 60px;
      }

body{
	width:100%;
	margin:0px;
	padding:0px;
	font-size: 1.3em;
	background-color:#ccc;
	}

#main{
	position:relative;
	width:720px;
	height:402px; /*574px;*/
	border:1px solid green;
	/*overflow: hidden;*/
	}
	
video{
position:relative;
width:720px;
/* border:1px solid green; */
}

#bag{
	position:absolute;
	left: 0; 
	right: 0; 
	margin-left: auto; 
	margin-right: auto; 
	width:722px;
	height:720px; /*402px;  574px; */
	top:0px;
	z-index:20;
	border:1px solid blue;
	}

canvas{
}

input{
font-size:1.2em;
}

button {
    position: relative;
    background-color:white; /*#4CAF50;*/
    border: none;
    font-size: 1.6em;
    font-weight:bold;
    margin:0.2em;
    color: black; /* #FFFFFF; */
    padding: 0.2em; 0.6em;
    text-align: center;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    text-decoration: none;
    overflow: hidden;
    cursor: pointer;

border-top: 5px solid #c0ffff ;
    border-right: 5px solid #00f ;
    border-bottom: 5px solid #00f ;
    border-left: 5px solid #c0ffff ;
    border: 5px outset #b37d00 ;
    border-style: outset;
}

button:after{ 
    content: "";
    background:magenta; /*red; #90EE90; */
    display: block;
    position: absolute;
    padding-top: 300%;
    padding-left: 350%;
    margin-left: -20px!important;
    margin-top: -120%;
    opacity: 0;
    transition: all 1.8s;
}

button:active:after {
    padding: 0;
    margin: 0;
    opacity:  1; 
    transition: 0s
}

textarea{
width:720px;
height:300px;
font-size:14pt;
}

#div1{
    border: 2px  aqua; /* #ffb3de; /* lightblue; */
    border-block-start-style: ridge;
    border-inline-start-style: ridge;
    border-inline-end-style: groove;
    border-block-end-style: groove;
}

#output {
  text-align:center;
  display: block; /*inline-block;*/
  top: 4px;
  position: relative;
  border: dotted 1px red; /* #ccc; */
  padding: 2px;
  width:720px;
}
.button {
  font-size:1.5em;
}
canvas{ 
display:block;
}
video{
position:relative;
width:100%;
}
#main{
height:575px; /* need dynamicaly update: bớt 10 (592 - 10) */
}
#bag{
height: 575px;
/* 584px; */
}

#div1{
   position: absolute;
left:20px;
top:523px;
width:673px;
height:36px;
}
</style>
</head>
<body id="body">
<div align="center">
<video id="video">
<source 
src="flame-mountain.mp4" type="video/mp4">
Your browser does not support HTML5 video.
</video>

</div>

<button id="begBut" onclick='vidBegin()'>Begin</button>

<button id="cit" onclick="shoot()">Capture</button>
  <br/>
  	<button onclick="mergeCanvases(snapshots)">Merge Canvases</button>
  <button type="button" onclick="pauseVid();">Pause</button>
    <button type="button" onclick="playVid();">Play</button>

<br>
  <div id="output"></div>
  <br>
<textarea id="area1new"
  	style="width:90%; height:120px; padding:1em">
</textarea>
<br><span style="color:red; font-size:1.4em">
If you use smartphone<br>
1- Pinch with two fingers to zoom out?<br>
2- Let use Chrome browser to open this html file<br>
Make sure the width of the html file is equal to the width of the phone, when held vertically.
</span>
<br>
  <textarea id="area1" style="width:90%; height:120px; padding:1em">
</textarea>
<br>
<button onclick= "removeEle()">New</button>
 
sec:
<input type="text" id="bBox" size="10" value="0" style="text-align:center">
<br>

</div>

</div>
<script>
  nn = 0;
  nnMax = 20; // 13;
  output = document.getElementById("output");

function removeEle(){
  		output.innerHTML = '';
   }

// jQuery UI implementation for mouse drag/resize   
   $( function() {
    $( ".box" ).resizable();
    $( ".box" ).draggable();
    video = document.getElementById('video');
    video.style.width = useW + 'px';
  });

var snapshots = [];
    var point = [];

function vidBegin(){
          video.currentTime = 			Number(document.getElementById('bBox').value);
		video.play();
}

function playVid() { 
    video.play(); 
}

function pauseVid() { 
    video.pause(); 
}

function crShow(){
	tt = parseInt($('#div1').css("top"))
	ll =  parseInt($('#div1').css('left'))
	ww = $('#div1').css("width");
	hh =  $('#div1').css('height');
	alert( 'Croping area\n\n' +
	'left: ' + ll + 'px; top: ' + tt + 'px' +'\n' +
	        'width: ' + ww + '; height: ' + hh);
	document.getElementById('lefttop').value = ll + 'px; ' + tt + 'px';
	document.getElementById('d1size').value = ww + '; ' + hh;
}

var vidw, vidh, wpx, hpx;

let video = document.getElementById('video');
let ele = document.getElementById('div1');
let maind =  document.getElementById('main');
let bagd =  document.getElementById('bag');

useW = 720;

video.onloadedmetadata = function() {
    // alert("Meta data for video loaded");
    onloading()
};

function onloading(){ 
ele.style.left = '38px';
ele.style.top = '484px';
ele.style.width = '640.44px';
ele.style.height = '80.44px';

vwidth = video.videoWidth;         
vheight = video.videoHeight;        
ratioWH = Math.round(vwidth/vheight*100)/100;
vidw = 720;
vidh = Math.round(vidw/ratio)
$('#vidw').val(vidw +'px; '+ vidh + 'px');

wpx = vidw + 'px'
hpx = vidh + 'px'

$('#video').css({"width": wpx});
$('#video').css({"height": hpx});

maind.style.width = wpx
maind.style.height = hpx

bagd.style.width  = wpx
bagd.style.height = hpx 
}

function shoot() {
        nn++;
        if(nn <= nnMax){
        var output = document.getElementById('output');
        var canvas = capture(video);

nnT = nn + '/' + nnMax
document.getElementById("nnBox").value = nnT
         snapshots.push(canvas);
        output.innerHTML = '';
        for (var i = 0; i < snapshots.length; i++) { 
            output.appendChild(snapshots[i]);
        }
     }else{
	   pauseVid();
	   nn = 0;
	   snapshots = [];
	   alert("Click buttons (Last canvas),\n(To images),\n" +
	            "(New), (Play)");
     }
    }

var ratioWH, ratio;

function capture(video) {
inf = 'left = ' +ele.style.left + '; top = ' + ele.style.top + '\n' +
        'width = ' + ele.style.width + '; height = ' +ele.style.height +
         '; ratioWH = ' + ratioWH;
$('#area1new').val(inf);

vidW= video.videoWidth;
        vidH = video.videoHeight; 
        ratio = Math.round(vidW/useW*100)/100;
	   
	   lf = (ele.style.left).replace('px', '');
        sx = Math.round(parseInt(lf)*ratio);
        
        tp = (ele.style.top).replace('px', '');
        sy = Math.round(parseInt(tp)*ratio);
       
        dw = Math.round(parseInt((ele.style.width).replace('px','')));
        sw = Math.round(dw*ratio);
        
	   dh = Math.round(parseInt((ele.style.height).replace('px','')));
        sh = Math.round(dh*ratio);

txt = 'sx = ' + sx + '; sy = ' + sy + 
         '; sw = ' + sw + '; \nsh = ' + sh + 
	    'dw = ' + dw + '; dh = ' + dh + 
	    '; \nratio = ' + vidW + '/' + useW + ' = ' + ratio;
	  $('#area1').val(txt);
	
        document.getElementById('output').style.width = dw + 'px'

var canvas = document.createElement('canvas');
        canvas.width = dw
        canvas.height = dh + 22
        var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.rect(0, 0, canvas.width, canvas.height)
ctx.fillStyle = "white";
ctx.fill();
ctx.font = "18px Arial";
xx = "#" + Math.round((video.currentTime - 0.800)*1000)/1000 + "#"
ctx.fillStyle = "black";
ctx.fillText(xx, 300, 16);
        sx = sx + 4;
        sy = sy + 4;
        ctx.drawImage(video, sx, sy, sw , sh, 0,22, dw, dh);
        return canvas;
    }
    
 /////////////

var totalWidth 
var totalHeight
var mergedCanvas
function mergeCanvases(canvases) {
    var mergedCanvas = document.createElement('canvas');
    var context = mergedCanvas.getContext('2d');
    totalWidth = canvases[0].width;
    totalHeight = canvases[0].height*canvases.length;// Calculate total height
// alert('TotalH = ' + totalHeight);
    mergedCanvas.width = totalWidth;
    mergedCanvas.height = totalHeight;
 mergedCanvas.style.display = "none";

var offsetY = 0; // Track the vertical offset

for (var i = 0; i < canvases.length; i++) {
        context.drawImage(canvases[i], 0, offsetY); // Draw each canvas at the current offset
        offsetY += canvases[i].height; // Update the offset
    }

document.body.appendChild(mergedCanvas);
    // context = mergedCanvas.getContext('2d');
  combinedImage = mergedCanvas.toDataURL('image/png');
  // Open the combined image in a new tab
  
var newTab = window.open('about:blank', '_blank');
  newTab.document.write('<img src="' + combinedImage + '" width="' + totalWidth + '" height="' + totalHeight + '">' + '<br><br>' +
'<div style="color:red; font-size:1.4em; width:' + totalWidth + 'px'+ '">You have to download the above image to your device.<br><br>If you used the Android Chrome browser to open this html file, you will download the above image to your phone as follows:<br><b>Press your finger on the photo above<br>When the menu appears, select "Download image"("Tải hình ảnh về")</b></div>'); 
}

</script>
</body>
</html>

JAVASSCRIPT ON IPAD (to see the list click ← then click ≡ and ⌄)

USE JAVASCRIPT TO CAPTURE OPEN SUBTITLES

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